You need to put some heat in your gas tank; sounds like you have water passing through the fuel injecters dirt in the intake manifold/throttle/air flow meter
The 2012 Audi TTS has an inline 4 engine.
The 2010 Audi TTS has an inline 4 engine.
The 2014 Audi TTS has an inline 4 engine.
The 2015 Audi TT has an inline 4 engine.
The 2011 Audi TT has an inline 4 engine.
The 2009 Audi TTS has an inline 4 engine.
The 2013 Audi TT has an inline 4 engine.
The 2010 Audi R8 has a V8 engine.
The 2001 Audi A6 has a V6 engine.
The 2014 Audi R8 has a V8 engine.
The 2003 Audi A6 has a V6 engine.
The 2009 Audi A6 has a V6 engine.